*heading
clay plasticity, beta=.5 k=.78 triaxial extension test, cax4r
*node,nset=soil
*nset,nset=bottom
*nset,nset=top
*nset,nset=lhs
*element,type=cax4r,elset=soil
*solid section,material=sample, elset=soil
*material,name=sample
*density
 1.0e-1
*elastic
 27580.,.3
*clay plasticity,hardening=tab
*clay hardening
*initial conditions,type=ratio
soil,1.08,0.,1.08,1.
*initial conditions,type=stress,geostatic
soil,-100.,0.,-100.,10.,1.
*step, nlgeom=no
  geostatic initial stress state
*dynamic,explicit
 ,1.0e-3
*boundary
top,2
bottom,2
lhs,1
*dload
1,p2,100.
*output,field
*element output
s,e,pe
*output,history
*element output, elset=soil
pe,peeq,press,mises
*end step
*amplitude, name=amp-1
 0.0,0.0,20.0,1.0
*step, nlgeom=no
  triaxial extension
*dynamic,explicit
 ,20.
*boundary, amplitude=amp-1
top,2,2,.2
*end step